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发明名称
Display device for viewing transparencies
摘要
申请公布号
US2795067(A)
申请公布日期
1957.06.11
申请号
US19540446332
申请日期
1954.07.28
申请人
FAIRHAVEN PROPERTIES CORP.
发明人
WALKER JACK A.
分类号
G02B27/02;G09F13/12
主分类号
G02B27/02
代理机构
代理人
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